Plesk 8.4 -> 8.6 problem, broke phpmyadmin

I've always updated to the newest Plesk without incident, so I didn't even consider that it'd break things so terribly today. My initial upgrade attempt ended in a failure, which resulted in all kinds of issues. I eventually attempted the upgrade again, this time it said it ended in success, but still indicated as if I should upgrade something, so I did this one more time. At this point my web server started functioning again, but since my phpmyadmin has ceased to function. Despite it telling me the upgrade was a success in my email, the login screen and subsequent 'whats new' screen and such all still say Plesk 8.4 instead of 8.6. I'm running Cent OS 5 on a quad core Intel Q9300. Attempting to use phpmyadmin yields the following error: MySQL said: Documentation #1045 - Access denied for user 'pma_<some 12 character hash here>'@'localhost' (using password: YES)

Any help would be hugely appreciated. It kind of looks like the autoupdate server was down when I tried to get the update from it or something and it crapped out and broke my install. In any case, the end of the initial upgrade failure log looks like this:

I also have the same problem from upgrading. It appears as though my config.inc.php file is missing from the phpmyadmin folder and the login details from the phpmyadmin/libraries/config.default.php is no longer matching any users in the mysql database!

Can someone please help out, we are missing the config file and still cant log in.